Group: Minnesota Department of Corrections

Description

Using a retrospective quasi-experimental design, this study evaluates the effectiveness of CD treatment provided within the Minnesota Department of Corrections (DOC) by comparing recidivism outcomes between treated and untreated offenders released from prison in 2005. As discussed later in more detail, propensity score matching (PSM) was used to individually match the untreated offenders with those who received CD treatment. Similar to the instrumental variable and Heckman approaches used by Pelissier and colleagues (2001), PSM is a method designed to control for selection bias. More specifically, PSM minimizes the threat of selection bias by creating a comparison group whose probability of entering treatment was similar to that of the treatment group. Although PSM has been used in at least one recent study on community-based CD treatment (Krebs, Strom, Koetse, and Lattimore, 2008), this study is one of the first to use it in a prison-based treatment evaluation.